Home / 15,511.38-21,407.91-8,798.67

Finding the Fourth Proportional to 15,511.38, 21,407.91 and 8,798.67

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Solution

The fourth proportional to 15,511.38, 21,407.91 and 8,798.67 is: 12,143.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.38 : 21,407.91 = 8,798.67 : x
  2. Step 2: Convert to fraction form
    15,511.38/21,407.91 = 8,798.67/x
  3. Step 3: Cross multiply
    15,511.38x = 21,407.91 × 8,798.67
  4. Step 4: Simplify right side
    15,511.38x = 188,361,135.48
  5. Step 5: Solve for x
    x = 188,361,135.48/15,511.38
  6. Step 6: Final answer
    x = 12,143.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.